Looking for the diagram for the trailer plug

When googling... don't be so specific.
Just try something like this...

gmc/ Chevy wiring 2003. Most sites will have breakdowns...ie.. lights...stereos.. speakers..etc. most years are close or compatible as well. Like 2000- 2005 will be almost identical.

get the standard wiring design
http://www.narva.com.au/products/browse/wiring-diagrams
Yellow is the left turn signal on pin 2
Check trailer plug and see if correct colors used on trailer plug
Would suggest getting a 12volt probe so you can test the car socket when left indicator is going on - flashing
To check that the correct pin has 12volts flashing left on it.

go to local parts house an get the rite harness for your truck look under back of truck unplug harnes an plug your kit in between factory harness

I am guessing you mean the 7 pin trailer tow adapter.

the 7 pin RV plug itself



The 2005 trailer tow adapter wire diagrams

You are probably going to find four wires together that do not have a plug on them. There should also be a tag taped on the wires showing that it is for the trailer. You will have to put a plug or some kind of connection on those wires.

buy adapter for 6 to 7 pin any auto store carries the adapters or if u want to change it out the new adapters paperwork will explain the change over

Look under the hood in the fuse pannel to the rear of the batterie.Think there is seperate fuses for the trailer in there.Lid will have diagram.

If you are going from a 4 pin on your trailer to the 7 pin on the truck. You need to go to parts store or a department store (ex Wal Mart) and look in trailer section and find the adapter. Thats what I did. Also Remember if your lights don't work on trailer, check the plug to make sure its tight or check the fuse under your drivers side rear seat for that fuse box.

Hi there;

Here is the wiring diagram for the trailer wiring for your truck.

Hope this helps
Farrout!

I believe you can look up the manufacturer of the trailer plug kit and find the wiring diagram there. On alot of the trailer plug kits, they have pics and diagrams in the package. The 7 pin plug (truck side) is available with the pig tail set up that plugs directly into the wiring harness for the lights. Then all you would have to worry about is the 2 wires for the electric brakes.